package thread;

public class ThreadDemo16 {
    private static int count = 0;
    public static void main(String[] args) throws InterruptedException {
        ThreadDemo16 t = new ThreadDemo16();

        Thread t1 = new Thread(() -> {
            for(int i = 0; i < 50000; i++){
                t.add();
            }
        });

        Thread t2 = new Thread(() -> {
            for(int i = 0; i < 50000; i++){
                t.add();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println("count = " + count);
    }

//    public void add(){
//        synchronized(this){
//            count++;
//        }
//    }

//    synchronized public void add(){
//        count++;
//    }

    public void add(){
        synchronized (ThreadDemo17.class){
            count++;
        }
    }
}
